Intel Core Ultra 5 135HL socket: LGA 1851
The Intel Core Ultra 5 135HL uses LGA 1851, the LGA socket for Meteor Lake-PS edge processors with DDR5-5600 and 20 PCIe Gen4 lanes. The 14-core chip at 45 W fits performance edge boards with vendor BIOS support.
- Socket
- LGA 1851
- Launched
- April 2024
- Cores and threads
- 14 and 18
- Base power
- 45 W
- Codename
- Meteor Lake-PS
- Segment
- Embedded
- Family
- Intel Core Ultra 5
- Clocks
- 1.7 / 4.6 GHz
Intel Core Ultra 5 135HL specifications
| Cores | 14 (4 Performance-cores plus 8 Efficient-cores plus 2 low-power E-cores) |
|---|---|
| Threads | 18 |
| Core architecture | Redwood Cove P-cores and Crestmont E-cores |
| Clocks | 1.7 GHz base, up to 4.6 GHz boost |
| Cache | 18 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 45 W |
| Manufacturing process | Intel 4 compute tile with Foveros packaging |
| Memory support | DDR5-5600, 2 channels, up to 96 GB |
| PCI Express | PCIe 4.0 x20 |
| Integrated graphics | Intel Arc Graphics, 128 EUs |
| NPU | Intel AI Boost |
| Multiplier | Locked |
| Package | FCLGA1851 (45.0 by 37.5 mm) |
Motherboard compatibility
Intel Core Ultra 5 135HL needs a motherboard with a LGA 1851 socket. Chipset by chipset data for this codename is not recorded yet. See the LGA 1851 chipset list and the board maker's CPU support list.
LGA 1851 at a glance
| Type | LGA, 1,851 contacts |
|---|---|
| Package size | 45.0 × 37.5 mm |
| Introduced | October 2024 |
| Memory | DDR5 only |
| Cooler mounting holes | 78 × 78 mm |
What the Core Ultra 5 135HL is
The Core Ultra 5 135HL is a 14-core and 18-thread edge processor that Intel launched in the second quarter of 2024 as the faster 5-series HL option. Four Performance-cores with 8 threads plus 8 Efficient-cores and 2 low-power E-cores run at 1.7 GHz base and up to 4.6 GHz boost. Cache is 18 MB of Smart Cache. The 45 W base with 65 W maximum assured sustains vision pipelines that dip on the 125HL.
Arc graphics with 128 execution units lift media and inference over the 112-EU tier. Video walls, retail analytics with multiple cameras and inspection stations with overlays all gain from the wider GPU. Shared DDR5 bandwidth matters here, so SODIMM speed and population deserve attention during sizing.
Buyers who want top 5-series edge speed without 16-core cost fit here. The 0.5 GHz base lift over the 125HL shortens batch jobs. Workloads that need 24 MB cache for large models should still step to 7-series HL such as the Intel Core Ultra 7 155HL, where cache and cores both grow.
Socket and motherboard compatibility
The 135HL fits LGA 1851 PS performance boards with 45 W to 65 W delivery. Retail desktop BIOS lines do not cover PS edge IDs, so industrial vendor support lists are authoritative. The neutral sentence reflects that board-specific reality.
Boards pair HL SKUs with DDR5 SODIMM, M.2 RAID and x16 slots for accelerators or grabbers. Power modes from 20 W minimum to 65 W maximum assured allow tuning for noise versus speed. A BIOS listing the 135HL is required before installation.
Within the 5-series HL pair the 135HL leads on clocks and GPU width. The Intel Core Ultra 5 125HL below saves money for lighter loads. The How to find your CPU socket type guide helps tell PS edge LGA 1851 boards from desktop LGA 1851 boards by labeling.
Memory, PCIe and cooling
DDR5-5600 up to 96 GB in two channels via SODIMM is shared by CPU, Arc GPU and NPU. Dual-module population is preferred for bandwidth to the 128-EU GPU. Capacity should cover OS, buffers and model weights together.
PCIe Gen4 x20 serves NVMe, networking and vision I/O. Typical splits give x16 to expansion plus M.2 storage and Key E wireless. Fixed board wiring means add-on combinations must be validated against the manual.
Cooling is active 45 W class with heatsink and chassis flow. No boxed cooler ships with edge tray parts. Inlet air to 60 C on industrial boards is rated only with the validated heatsink and airflow, so third-party coolers need vendor approval.
Upgrade paths
LGA allows HL-to-HL moves where listed, such as from the 125HL to this 135HL. Memory and storage can also expand. Power and BIOS must already support the target.
The next tier is 16-core HL with 24 MB cache for larger models. A working 135HL serves for years with drive maintenance. Desktop Arrow Lake on LGA 1851 is a separate board class despite the shared socket name.
Frequently asked questions
What socket does the Core Ultra 5 135HL use?
It uses LGA 1851 PS edge packaging for 45 W boards. Vendor BIOS lists govern fit.
How fast is the Core Ultra 5 135HL?
Fourteen cores and 18 threads at 1.7 GHz base and up to 4.6 GHz boost, with 18 MB of cache at 45 W.
What graphics does the 135HL include?
Intel Arc with 128 execution units plus AI Boost NPU for edge vision and media.
What cooling does the 135HL need?
Active cooling for 45 W with chassis airflow. Fanless sealed designs should use UL 15 W parts.
Sources and verification
- Intel Core Ultra processors Series 1 ARK list 135HL 14 cores 4.6GHz (Intel ARK)
- Intel Core Ultra Meteor Lake PS LGA1851 and Raptor Lake PS LGA1700 edge CPUs (Wccftech)
- Intel Core Ultra PS product brief LGA socket DDR5 PCIe (Intel)
Facts last checked against these sources on . Page last edited on .